ScrollableControl.OnPaintBackground(PaintEventArgs) ScrollableControl.OnPaintBackground(PaintEventArgs) ScrollableControl.OnPaintBackground(PaintEventArgs) ScrollableControl.OnPaintBackground(PaintEventArgs) Method

定義

繪製控制項的背景。Paints the background of the control.

protected:
 override void OnPaintBackground(System::Windows::Forms::PaintEventArgs ^ e);
protected override void OnPaintBackground (System.Windows.Forms.PaintEventArgs e);
override this.OnPaintBackground : System.Windows.Forms.PaintEventArgs -> unit
Protected Overrides Sub OnPaintBackground (e As PaintEventArgs)

參數

e
PaintEventArgs PaintEventArgs PaintEventArgs PaintEventArgs

PaintEventArgs,其中包含事件資料。A PaintEventArgs that contains the event data.

備註

引發事件會透過委派叫用此事件處理常式。Raising an event invokes the event handler through a delegate. 如需詳細資訊, 請參閱處理和引發事件For more information, see Handling and Raising Events.

OnPaintBackground 方法也允許衍生類別處理事件,而不用附加委派。The OnPaintBackground method also allows derived classes to handle the event without attaching a delegate. 這是在衍生類別中處理事件的慣用技巧。This is the preferred technique for handling the event in a derived class.

給繼承者的注意事項

在衍生OnPaintBackground(PaintEventArgs)類別中覆寫時,請務必呼叫基類OnPaintBackground(PaintEventArgs)的方法,讓已註冊的委派能接收事件。When overriding OnPaintBackground(PaintEventArgs) in a derived class, be sure to call the base class' OnPaintBackground(PaintEventArgs) method so that registered delegates receive the event.

適用於